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<h1 class="title">main.cpp Example File</h1>
<span class="small-subtitle">video/qmlvideofx/main.cpp</span>
<!-- $$$video/qmlvideofx/main.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp"><span class="comment">/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>

<span class="preprocessor">#include &lt;QtCore/QStandardPaths&gt;</span>
<span class="preprocessor">#include &lt;QtCore/QStringList&gt;</span>
<span class="preprocessor">#include &lt;QtQml/QQmlContext&gt;</span>
<span class="preprocessor">#include &lt;QtGui/QGuiApplication&gt;</span>
<span class="preprocessor">#include &lt;QtQuick/QQuickItem&gt;</span>
<span class="preprocessor">#include &lt;QtQuick/QQuickView&gt;</span>
<span class="preprocessor">#include &quot;filereader.h&quot;</span>
<span class="preprocessor">#include &quot;trace.h&quot;</span>

<span class="preprocessor">#ifdef SMALL_SCREEN_LAYOUT</span>
    <span class="keyword">static</span> <span class="keyword">const</span> QLatin1String MainQmlFile(<span class="string">&quot;main-smallscreen.qml&quot;</span>);
<span class="preprocessor">#else</span>
    <span class="keyword">static</span> <span class="keyword">const</span> QLatin1String MainQmlFile(<span class="string">&quot;main-largescreen.qml&quot;</span>);
<span class="preprocessor">#endif</span>

<span class="preprocessor">#ifdef PERFORMANCEMONITOR_SUPPORT</span>
<span class="preprocessor">#include &quot;performancemonitordeclarative.h&quot;</span>
<span class="preprocessor">#endif</span>

<span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span>argv<span class="operator">[</span><span class="operator">]</span>)
{
    <span class="type">QGuiApplication</span> app(argc<span class="operator">,</span> argv);

<span class="preprocessor">#ifdef PERFORMANCEMONITOR_SUPPORT</span>
    PerformanceMonitor<span class="operator">::</span>qmlRegisterTypes();
<span class="preprocessor">#endif</span>

    <span class="type">QUrl</span> fileName;
    <span class="type">qreal</span> volume <span class="operator">=</span> <span class="number">0.5</span>;
    <span class="type">QStringList</span> args <span class="operator">=</span> app<span class="operator">.</span>arguments();
<span class="preprocessor">#ifdef PERFORMANCEMONITOR_SUPPORT</span>
    PerformanceMonitor<span class="operator">::</span>State performanceMonitorState;
<span class="preprocessor">#endif</span>
    <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">1</span>; i <span class="operator">&lt;</span> args<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) {
        <span class="keyword">const</span> <span class="type">QByteArray</span> arg <span class="operator">=</span> args<span class="operator">.</span>at(i)<span class="operator">.</span>toUtf8();
        <span class="keyword">if</span> (arg<span class="operator">.</span>startsWith(<span class="char">'-'</span>)) {
            <span class="keyword">if</span> (<span class="string">&quot;-volume&quot;</span> <span class="operator">=</span><span class="operator">=</span> arg) {
                <span class="keyword">if</span> (i <span class="operator">+</span> <span class="number">1</span> <span class="operator">&lt;</span> args<span class="operator">.</span>size())
                    volume <span class="operator">=</span> <span class="number">0.01</span> <span class="operator">*</span> args<span class="operator">.</span>at(<span class="operator">+</span><span class="operator">+</span>i)<span class="operator">.</span>toInt();
                <span class="keyword">else</span>
                    qtTrace() <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;Option \&quot;-volume\&quot; takes a value&quot;</span>;
            }
<span class="preprocessor">#ifdef PERFORMANCEMONITOR_SUPPORT</span>
            <span class="keyword">else</span> <span class="keyword">if</span> (performanceMonitorState<span class="operator">.</span>parseArgument(arg)) {
                <span class="comment">// Do nothing</span>
            }
<span class="preprocessor">#endif</span>
            <span class="keyword">else</span> {
                qtTrace() <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;Option&quot;</span> <span class="operator">&lt;</span><span class="operator">&lt;</span> arg <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;ignored&quot;</span>;
            }
        } <span class="keyword">else</span> {
            <span class="keyword">if</span> (fileName<span class="operator">.</span>isEmpty())
                fileName <span class="operator">=</span> <span class="type">QUrl</span><span class="operator">::</span>fromLocalFile(arg);
            <span class="keyword">else</span>
                qtTrace() <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;Argument&quot;</span> <span class="operator">&lt;</span><span class="operator">&lt;</span> arg <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="string">&quot;ignored&quot;</span>;
        }
    }

    <span class="type">QQuickView</span> viewer;

    viewer<span class="operator">.</span>setSource(QLatin1String(<span class="string">&quot;qrc:///qml/qmlvideofx/&quot;</span>) <span class="operator">+</span> MainQmlFile);
    <span class="type">QQuickItem</span> <span class="operator">*</span>rootObject <span class="operator">=</span> viewer<span class="operator">.</span>rootObject();
    rootObject<span class="operator">-</span><span class="operator">&gt;</span>setProperty(<span class="string">&quot;fileName&quot;</span><span class="operator">,</span> fileName);
    viewer<span class="operator">.</span>rootObject()<span class="operator">-</span><span class="operator">&gt;</span>setProperty(<span class="string">&quot;volume&quot;</span><span class="operator">,</span> volume);

<span class="preprocessor">#ifdef PERFORMANCEMONITOR_SUPPORT</span>
    <span class="keyword">if</span> (performanceMonitorState<span class="operator">.</span>valid) {
        rootObject<span class="operator">-</span><span class="operator">&gt;</span>setProperty(<span class="string">&quot;perfMonitorsLogging&quot;</span><span class="operator">,</span> performanceMonitorState<span class="operator">.</span>logging);
        rootObject<span class="operator">-</span><span class="operator">&gt;</span>setProperty(<span class="string">&quot;perfMonitorsVisible&quot;</span><span class="operator">,</span> performanceMonitorState<span class="operator">.</span>visible);
    }
    <span class="type">QObject</span><span class="operator">::</span>connect(<span class="operator">&amp;</span>viewer<span class="operator">,</span> SIGNAL(afterRendering())<span class="operator">,</span>
                     rootObject<span class="operator">,</span> SLOT(qmlFramePainted()));
<span class="preprocessor">#endif</span>

    FileReader fileReader;
    viewer<span class="operator">.</span>rootContext()<span class="operator">-</span><span class="operator">&gt;</span>setContextProperty(<span class="string">&quot;fileReader&quot;</span><span class="operator">,</span> <span class="operator">&amp;</span>fileReader);

    <span class="keyword">const</span> <span class="type">QUrl</span> appPath(<span class="type">QUrl</span><span class="operator">::</span>fromLocalFile(app<span class="operator">.</span>applicationDirPath()));
    <span class="keyword">const</span> <span class="type">QStringList</span> picturesLocation <span class="operator">=</span> <span class="type">QStandardPaths</span><span class="operator">::</span>standardLocations(<span class="type">QStandardPaths</span><span class="operator">::</span>PicturesLocation);
    <span class="keyword">const</span> <span class="type">QUrl</span> imagePath <span class="operator">=</span> picturesLocation<span class="operator">.</span>isEmpty() <span class="operator">?</span> appPath : <span class="type">QUrl</span><span class="operator">::</span>fromLocalFile(picturesLocation<span class="operator">.</span>first());
    viewer<span class="operator">.</span>rootContext()<span class="operator">-</span><span class="operator">&gt;</span>setContextProperty(<span class="string">&quot;imagePath&quot;</span><span class="operator">,</span> imagePath);

    <span class="keyword">const</span> <span class="type">QStringList</span> moviesLocation <span class="operator">=</span> <span class="type">QStandardPaths</span><span class="operator">::</span>standardLocations(<span class="type">QStandardPaths</span><span class="operator">::</span>MoviesLocation);
    <span class="keyword">const</span> <span class="type">QUrl</span> videoPath <span class="operator">=</span> moviesLocation<span class="operator">.</span>isEmpty() <span class="operator">?</span> appPath : <span class="type">QUrl</span><span class="operator">::</span>fromLocalFile(moviesLocation<span class="operator">.</span>first());
    viewer<span class="operator">.</span>rootContext()<span class="operator">-</span><span class="operator">&gt;</span>setContextProperty(<span class="string">&quot;videoPath&quot;</span><span class="operator">,</span> videoPath);

    viewer<span class="operator">.</span>setTitle(<span class="string">&quot;qmlvideofx&quot;</span>);
    viewer<span class="operator">.</span>setFlags(<span class="type">Qt</span><span class="operator">::</span>Window <span class="operator">|</span> <span class="type">Qt</span><span class="operator">::</span>WindowSystemMenuHint <span class="operator">|</span> <span class="type">Qt</span><span class="operator">::</span>WindowTitleHint <span class="operator">|</span>
                          <span class="type">Qt</span><span class="operator">::</span>WindowMinMaxButtonsHint <span class="operator">|</span> <span class="type">Qt</span><span class="operator">::</span>WindowCloseButtonHint);
    viewer<span class="operator">.</span>setMinimumSize(<span class="type">QSize</span>(<span class="number">600</span><span class="operator">,</span> <span class="number">400</span>));

<span class="preprocessor">#ifdef SMALL_SCREEN_PHYSICAL</span>
    viewer<span class="operator">.</span>showFullScreen();
<span class="preprocessor">#else</span>
    viewer<span class="operator">.</span>show();
<span class="preprocessor">#endif</span>

    <span class="comment">// Delay invocation of init until the event loop has started, to work around</span>
    <span class="comment">// a GL context issue on Harmattan: without this, we get the following error</span>
    <span class="comment">// when the first ShaderEffectItem is created:</span>
    <span class="comment">// &quot;QGLShaderProgram::addShader: Program and shader are not associated with same context&quot;</span>
    <span class="type">QMetaObject</span><span class="operator">::</span>invokeMethod(viewer<span class="operator">.</span>rootObject()<span class="operator">,</span> <span class="string">&quot;init&quot;</span><span class="operator">,</span> <span class="type">Qt</span><span class="operator">::</span>QueuedConnection);

    <span class="keyword">return</span> app<span class="operator">.</span>exec();
}</pre>
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<!-- @@@video/qmlvideofx/main.cpp -->
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   subsidiaries. Documentation contributions included herein are the copyrights of
   their respective owners.<br>    The documentation provided herein is licensed under the terms of the    <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation    License version 1.3</a> as published by the Free Software Foundation.<br>    Digia, Qt and their respective logos are trademarks of Digia Plc     in Finland and/or other countries worldwide. All other trademarks are property
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